Starnheim Courser
Creature — Pegasus
Flying
Artifact and enchantment spells you cast cost 
less to cast.
Every worthy warrior who arrives in Starnheim is gifted a mount befitting their heroism, a mighty pegasus raised and trained by the valkyries.
2/2
Illustrated by
Foundations Jumpstart#261CommonEnglishLegality
Rulings
Feb 5, 2021
To determine the total cost of a spell, start with the mana cost or alternative cost you’re paying, add any cost increases, then apply any cost reductions (such as that of Starnheim Courser). The converted mana cost of the spell is determined only by its mana cost, no matter what the total cost to cast the spell was.
Feb 5, 2021
The cost reduction applies only to generic mana in the costs of artifact and enchantment spells you cast. It can’t reduce requirements of specific colors of mana.